Dvd Player Seeing Non-Image Files With Jpgs

I am trying to create a data DVD containing jpg-format image files that will be playable on the DVD player (Sony DVP-NS90V) attached to my TV. I have tried both the "Mac & PC" and "Photo Disc" formats and have encountered the same problem. Although it does display the images as a slide show, before each image appears, it displays an error message, "Data error (IMAGE)." When I use the "picture navi" button on the player's remote, I see what may be a clue to the problem. It displays the contents of the folder and what I see is that every odd-numbered file in the folder is not an image. I only see image thumbnails in the even-numbered entries of the folder. The error messages are obviously a result of the player trying to display these non-image files, but I have no idea what they are, where they came from or how to get rid of them. The folder I dropped on Toast contains only jpg files. At first I thought that theses might be resource forks but then I read that those were done away with in the transition from OS 9 to OS X (these jpg files were created on an OS X 10.4.11 G4). I am running Toast version 8.0.5. Any ideas on how to prevent these non-image files from being recorded on the DVD?

Thank you "theoldarchiver" for your explanation of resource forks. That was the problem. Turns out I already had an application that can remove them, "File Buddy" but I had never noticed that feature before. After removing the resource forks and burning the resulting jpg files to another DVD, the player was able to display the photos without errors.

Resource forks for applications are gone in OS X, but document files on HFS+ can still have resource forks. Photoshop CS4 puts small version Finder icons in resource forks for image files (this can be set in Preferences). Not sure about CS5. Several other image editing apps use it too.

There are tools to remove resource forks from selected files. The GrimRipperCM contextual menu can do it.